Cylinder for printing-machines.



No. 733,276. PATENTED JULY 7, I903.

0. ROBSEN. CYLINDER FOR PRINTING MACHINES.

APPLICATION FILED NOV. 12, 1902.

N0 MODEL.

UNITED STATES,

Patented. July 7", 1903.

PATENT OFFICE.

OSCAR ROESEN, on NEW YORK, N. Y., ASSIGNOR TO ROBERT HOE, or NEw YORK,N.Y.

CYLiNDER FOR PRINTING-MACHINES.

SPECIFICATION formingpart of Letters Patent N0. 733,276, dated July 7,1903.

Application filed November 12, 1902. Serial No. 130,967. (No model.) I

To ctZZ whom it may concern:

Be it known that I, OSCAR ROESEN, a citizen of the United States,residing at New York, county of New York, and State of New York, haveinvented certain new and useful Improvements in Cylinders forPrinting-Machines, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in cylinders forprinting-machines.

In printing-machines employinga plurality of printing-couples it isdesirable to arrange the cylinders of one or more of the rotary couplesso that the direction of rotation of the cylinders may be reversed. Inconstructions in which the plate-cylinders are arranged to carrystaggered plates, however, when the direction of rotation of one or moreof the couples is reversed the impressions do not fall in properrelation on opposite sides of the web, and it has been customary in mostcases to introduce a special slitting mechanism into the machine andalso to use special compensating mechanism to retard or increase thelength of travel of one or both portions of the web, so as to bring theimpressions on opposite sides of the web into proper relation with theother webs with which they are to be associated. The introduction ofslitting and compensating mechanisms produces a machine of considerablecomplexity and is objectionable for that and other reasons. If, however,the use of these slitting and compensating mechanisms is to be avoided,the stagger of the plates must'be changedthat is to say, the plateswhich are in advance when the cylinders are rotating in one directionmust be the rear set of plates when the cylinders are rotating in theother direction plates, however, necessitates in couples of the ordinaryconstruction a corresponding change in the position of the impression-surfaces which correspond to the platesthat is to say, the surface onthe impression-cylinder which is the leading surface when the couple isrunning in one direction must be the rear surface when the couple isrunning in the opposite direction.

This change in the stagger of the The present invention has for one ofits objects to produce a cylinder adapted for use in a printing-couplearranged to carry staggered plates, the cylinder being so constructedthat the changes of stagger incident to a reversal of the couple may bereadily and easily made.

A further object of the invention is to produce an impression-cylinderadapted for use in a couple arranged to print from staggered plates inwhich the position of the impressionsurfaces and the blankets andotherappurtenances incident thereto maybe readily shifted when thestagger of the plates is altered.

- With these and other objects in view the invention consists in certainconstructions and in certain parts, improvements, and combinations, aswill be hereinafter fully described and then specifically pointed out inthe claims hereunto appended.

In the accompanying drawings, Figurel is an elevation, partly brokenaway, of the improved cylinder. Fig. 2 is a sectional end elevation ofthe construction shown in Fig. 1. Fig. 3 illustrates a modifiedconstruction of cylinder. Fig. 4 is a sectional end elevation of theconstruction shown in Fig. 3.

Referring to the drawings, 1 indicates a cylinder adapted for use in aprinting-couple. In the construction shown the cylinder 1 is animpression-cylinderwhich is mounted on a shaft 2, supported in the framein the usual manner. This cylinder is adapted for use with aplate-cylinder carrying sets of staggered plates and is constructedsothat the position of the impression-surfaces may be altered when thestagger of the plates is alteredas, for instance, when the direction ofrotation of the couple is reversed. The means these gaps is located inadvance of the gap ii 3, and the other is located in the rear of saidgap 3, said gap 3 being, therefore, opposite the space between the twogaps and substantially midway of said space. Assuming that the cylinderis running in the direction of the arrow in Fig. 1, the gap 4 willdefine or form the head of the impression-surface on the left-hand sideof the cylinder, said surface cooperating with the leading set of plateson the plate-cylinder, and the gap 3 will form or define the head of theimpressionsurface on the right-hand side of thecylinder, said surfacecooperating with the rear set of plates on the plate-cylinder. When,however, the direction of the cylinder is reversed, theimpression-surface the head of which is defined by the gap 5 willcooperate with the leading set of plates on the platecylinder, and theimpression-surface whose head is defined by the gap 3 will cooperatewith the rear set of plates. In order that the impression-surfacepresented to the plates may be unbroken, gap-filling means are employed,which may be varied widely in construction. Two forms of gap-fillingmeans are shown.

Referring to Figs. 1 and 2, the gaps 4.- and 5 are shown as havinggrooved sides, the grooves being marked 6, and codperating with thesegrooved gaps is a tongued block 7, which is preferably adapted to beinserted in either groove. When the cylinder is running in the directionindicated by the arrow in Fig. 1, therefore, the block will be insertedin the gap 5, thus filling this gap and causing the cylinder topresentan unbroken impression surface, except for the gap 4;, which defines itsleading end. When, however, the cylinder is running in the oppositedirection, the block 7 will be inserted in the groove 4.

Referring to the modification shown in Figs. 3 and 4, the surface of thecylinder between the grooves is recessed or cut away, as clearlyindicated in Fig. 4, and located in this recess is a sliding plate 8,said plate being provided with slots 9 and being held in position byset-screws 10, the slots being countersunk, so that the heads of thescrews come below the surface of the cylinder. This plate 8 is wideenough so as to reach from the rear edge of one gap to the rear edge ofthe other gap. If, therefore, it is desired to leave the gap 4: open,the plate is adjusted, asshown in Fig. 4:, so that its front edgecorresponds with the rear edge of the gap at and its rear edgecorresponds with the rear edge of the gap 5. If, however,it is desiredto leave the gap 5 open, the plate is shifted so as to cover the gap 4.

When the cylinder isemployed as an impression-cylinder, it will beprovided with blanket-retaining devices, which may be of any desireddescription. While a single set of blanket-retaining devices might beemployed for all the blankets on the cylinder or a set of retainingdevices might be provided for the blanket on one side of the cylinderand another set of retaining devices for the blanket on the other sideof the cylinder, in the preferred construction and as shown there willbe a set of retaining devices for each gap, said devices being locatedadjacent the gaps. As illustrated, the gap at has adjacent to it on oneside a set of pins 11 and on the other side a reel-rod 12. Reel-rods 13and 14., serving to support the usual shifting tympan, may also beprovided, if desired. These reel-rods are of the ordinary constructionwell known in printing-machines, and the agencies for rotating them andholding them in position are well known, so that any further or specificdescription of them is unnecessary. In the construction shown when thedirection of rotation of the cylinder is reversed the blanket andshifting tympan will be transferred from the holding devices adjacentthe gap I to the holding devices adjacent the gap 5.

Changes and variations may be made in the constructions by which theinvention is carried into effect. The invention is not, therefore, to beconfined to the specific construc= tion hereinbefore described.

hat is claimed is.

1. In a printing-machine, the combination with a cylinder provided withsecuring means for a plurality of blankets arranged side by side andstaggered with respect to each other, of means for shifting the relativeposition with respect to each other of said blankets on the surface ofthe cylinder whereby the stagger of the blankets with respect to eachother may be varied, substantially as described.

2. In a printing-machine, the combination with a cylinder provided withsecuring means for a plurality of blankets arranged side by side, of aplurality of gaps arranged so that the relative position of the blanketswith respect to each other may be varied, and gapfilling means,substantially as described.

3. In a printing-machine, the combination with a cylinder of a widthadapted to provide a plurality of impression-surfaces side by side, saidcylinder having a plurality of gaps arranged so that the position of theleading ends of the impression-surfaces may be shifted, and gap-fillingmeans, substantially as described.

4. In a printing-machine, the combination with a cylinder having twogaps on one side of the cylinder and a gap on the other side positionedopposite the space between the two gaps, of a gap-filling means adaptedto close either of the two gaps, substantially as described.

5. In a printing-machine, the combination with a cylinder having twogaps on one side and a gap on the opposite side positioned opposite thespace between the two gaps, of a gap-filling block, substantially asdescribed.

6. In a printing-machine, the combination with a cylinder having twogaps on one side and a gap on the other side positioned oppoand agap-filling block, substantially as desite the space between the twogaps, of blanscribed.

ket-securing devices adjacent to the gaps, In testimony whereof I havehereunto set and gap-filling means, substantially as demy hand in thepresence of two subscribing 5 scribed. witnesses.

7. In a printin -machine the combination V with a cylinder h aving twogaps on one side U OSCAR ROESEN' and a gap on the other side positionedoppo- Witnesses: site the space between the two gaps, of blan- OTTO L.RAABE, 1o ket-securing devices adjacent to the gaps, P. P. OHEWS.

